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2.1 Mounting of optional equipment
Mounting of sound box
From the factory, the Fan will be installed in the sound
box (optional equipment). The box must be mounted on
horizontal surfaces and may only be mounted with ver-
tical outlet.
Mounting of the motor protection switch
Flow guard
In Denmark, all Fans must be supplied with a control de-
vice for the control of correct suction in compliance with
The Danish Working Environment Service. Please refer
to the separate instructions in this matter.
2.2 Trial run – exact adjustment
After the installation has been completed, please check
whether there are any vibrations in the Fan.
We recommend checking whether the Fan supplies the
correct volume of air, for which the equipment has been
dimensioned. I.e. control the volume of air and make
sure that it does not exceed the ampere capacity of the
motor.
3.0 User instruction – application
When extracting large quantities of air, containing dust,
the fan wheel may get out of balance due to dirt on the
wheel. In order to avoid this, we recommend using a fil-
ter.
In many cases, the Fan is started by pushing the green
button on the motor protection switch (if automatics are
not used).
The Fan does not work according to the purposes, if …
- unauthorised parts have been mounted on the Fan
(e.g. unauthorised wheel).
- the wheel runs in the wrong direction. It will still work,
but the capacity will be reduced to a third of the normal
capacity.
- no motor protection switch is used.
Terminal box
Circuit breaker
3x400V
1x230V
3x230V
1x690V
Recommendations:
For installation we recommend following
EN-60079-14
For service and inspection: EN-60079-17
In order to fully comply with the ATEX directive.
4.0 Maintenance
Periodic maintenance
• In principle, the motor is maintenance-free because
of the factory-mounted, completely closed special ball
bearings, which do not require any maintenance. Ex-
change of worn bearings should only be carried out by
an electrician.
• The wheel and the fan housing should be cleaned
every year or according to requirement. The wheel and
the housing may be cleaned by means of a washing-up
brush and dishwater. Remember to disconnect the pow-
er before the washing and to wipe the parts afterwards
with a dry cloth. This operation results in a longer life of
the Fan.
• Keep motor free of dust and dirt to avoid overheating.
Clean regularly.
At least once annually, the whole point extraction plant
should be overhauled by an authorised serviceman.
4.1 Trouble-shooting
Remember always to use a motor protection switch!
Always use adjustment damper!
In case of problems with the Fan, the following items
may be reviewed in order to check whether:
The volume of air or the pressure is below the stated
level:
• Wrong direction of operation of the wheel. May be
due to wrong electrical installation. Please doub-
le-check the direction of rotation. Swop two phases,
if necessary.
• Leaky channel system.
• Poor inlet/outlet possibilities near the Fan may redu-
ce the yield (e.g. 90° bend before the inlet).
• Damaged wheel.
• The rotation speed has been set lower.
• If the temperature deviates substantially from the lab
measurements, where the temperature was 20°C
with an atmospheric pressure of 101.4 kPa.
• The dampers have not been correctly adjusted.
• The central lid on the sound box is turned the wrong
way and thus blocks the air.
• The suction net has been blocked by cotton waste, a
cloth or the like.
Vibrations and noise
• The base is not level/stable.
• Elements coming from the outside are stuck in the
Fan.
• Damaged wheel or motor.